On Monday, 21 November 2016 at 16:24:38 UTC, Q. Schroll wrote:
Why don't lambdas cast to a delegate if they are of type R function(Args)? I don't see any reason to that; a lambda should be a delegate type by default, and a function only as a special guarantee/optimization. It just makes them cumbersome to use with toDelegate. Probably there is a good reason why R function(Args) does not implicitly cast to R delegate(Args); I can imagine something internally (memory layout etc.) causes that. I'd just like to know.
A delegate has the hidden context pointer as parameter in addition to the 'visible' parameters. That causes functions and delegates with the same declared params to look different on the ABI level.
